I don't think anything is wrong with Luke Cage comic origin its more cinematic and deeper than alot of other heroes.
Born and raised in New York City's Harlem neighborhood, Lucas spends his youth in a gang called the Rivals. With his friend Willis Stryker, he fights the rival gang the Diablos and commits petty thefts, often on behalf of deformed crime lord Sonny Caputo, a.k.a. Hammer. In and out of juvenile homes throughout his teens, Lucas dreams of becoming a major New York racketeer until he finally realizes how his actions are hurting his family. He seeks to better himself as an adult by finding legitimate employment. Meanwhile, Stryker rises through the ranks of crime, but the two men remain friends. When Stryker's activities anger the Maggia (a.k.a. the Syndicate), he is badly beaten in a mob hit, saved only by Lucas' intervention. When Stryker's girlfriend, Reva Connors, breaks up with him in fear of his violent work, she seeks solace with Lucas. Stryker is convinced that Lucas is responsible for the breakup, so he plants heroin in Lucas' apartment and tips off the police. Lucas is arrested and sent to prison where contact with his family is sparse due to the resentment of his brother James, Jr., who intercepts Lucas' letters to their father James and eventually leads each to believe the other is dead.
In prison, Lucas is consumed by rage over Stryker's betrayal and his father's supposed death, engaging in frequent brawls and escape attempts. Eventually transferred to Seagate Prison off the coast of Georgia, he becomes the favorite target of sadistic guard Albert "Billy Bob" Rackham, whose brutality ultimately leads to a demotion that he blames on Lucas.
Later, research scientist Dr. Noah Burstein recruits Lucas as a volunteer for experimental cell regeneration based on a variant of the Super-Soldier process he had previously used to empower Captain America. Burstein immerses Lucas in an electrical field conducted by an organic chemical compound; when he leaves Lucas unattended, Rackham alters the experiment's controls, hoping to maim or kill Lucas. Lucas' treatment is accelerated past its intended limits, inducing body-wide enhancements that give him superhuman strength and durability. He uses his new power to escape Seagate and makes his way back to New York, where a chance encounter with criminals inspires him to use his new powers for profit.
The second half of the movie after cage escaped should be him tracking down Stryker who now works for crime lord bushmaster who has now taken over control of new yorks crime empire in an attempt to clear his name and get revenge all the while the cops as chasing him as a wanted man.
People often say Luke Cage being angry is a negative thing but it makes sense considering his origin. If you turned your life around only to have your best friend set you up, a girl friend be killed, be beaten by racist guards daily and told your father was dead when you were in prison you would be pretty damn angry when you got out as well.